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        attribute vec3 vPosition;
        attribute vec3 vColor;
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        void main()
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    <script id="fragment-shader" type="x-shader/x-fragment">
        precision mediump float;
        varying vec4 color;
        void main()
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            gl_FragColor = color;
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    <script type = "text/javascript" src = "../Common/webgl-utils.js"></script>
    <script type = "text/javascript" src = "../Common/initShaders.js"></script>
    <script type = "text/javascript" src = "../Common/MV.js"></script>
    <script type = "text/javascript" src = "pro_1.js"></script>

    <body>
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